Oscillators: 579R270ITT

The 579R270ITT oscillator is a combination of a general-purpose integrated circuit and a surface mount transistor. It is most commonly used in audio/visual applications such as television, broadcast radio, and CD players. This oscillator is capable of producing sine, square, and triangle waveforms.

Application Field

The 579R270ITT oscillator has been primarily designed for use in the production of audio/visual signals. They are widely used in television and broadcast radio as they are able to generate accurate timebases in order to lock onto and stay tuned to a receiver signal. They are also used in CD players as they are able to generate higher frequencies that can accurately represent the data stored in compact discs. Additionally, the 579R270ITT oscillator has been used in other applications such as cellular phones and medical imaging.

Working Principle

The 579R270ITT oscillator works through the use of a relaxation oscillator circuit, which is an electronic circuit consisting of an amplifier and an RC network. This RC network is usually a capacitor and a resistor connected in series, and the amplifier is typically a transistor. The RC time constant occurs when the capacitor is charged or discharged quickly. The amplifier then produces a signal that is proportional in amplitude and frequency to the time constants of the RC network.

The 579R270ITT oscillator works in a two-stage amplifier configuration, such that the amplification of the signal produced by the RC network is done in two stages; a differential or single-ended amplifier. The output of the amplifier is then sent to the third stage, which is an RC low pass filter. This filter determines the waveform of the output signal, such as a sine, square, or triangle. The filtered signal is then sent to an output buffer that amplifies and sends the output signal to the media.

Advantages

• High frequency accuracy
• Able to produce sine, square and triangle waveforms
• High stability and dynamic range
• Low power consumption
• Long operational lifespan
• Cost effective

Disadvantages

• Limited frequency range
• Sensitivity to environmental conditions
• Vibration can cause interference
• Relatively fragile components

Conclusion

The 579R270ITT oscillator is an integrated circuit designed for use in audio/visual applications such as television, radio broadcast, and CD players. It works on the principle of a relaxation oscillator, using a two-stage amplification and a low pass filter. It has a number of advantages such as high frequency accuracy, low power consumption, and cost effectiveness, but has some drawbacks such as limitation on the frequency range and environmental sensitivity. In any case, the 579R270ITT oscillator remains a useful and reliable component for audio/visual systems.